Damper.



W. S. MILLER.

DAMPER.

APPLIUATION FILED JUNE 7, ma.

Patented July 28, 1914.

Inventor t r I Witnesses Attorneys THE NORRIS PETERS CO.. PHOTO-LITHQ. WASHINGTON, D4 C nn sTATnsPATENT ortica.

WILLOUGHBY S. MILLER, OF READING,l PENNSYLVANIA, ASSIGNOR OF ONE-HALF T0 JAMES H. KNQLL, OF READING, PENNSYLVANIA.

DAMPER.

incassa.

Specification of Letters Eatent.

Patented July 28, 1914.

To all 'whom it may concern Be it knowny that I, WILLOUGHBY LER, a citizen of the United States, residing at Beading, in the county of Berks and State of Pennsylvania, have invented a new and useful Damper, of which the following is a specification.

My invention relates to new and useful improvements in a damper and has for its primary object the provision of means for easily adjusting and regulating the damper to provide the proper draft.

A further object of the invention is the provision of means for adjusting the damper to accommodate stove pipes of various sizes.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

ln the drawings: Figure 1 is a front view partly broken away to show the interior. Fig. 2 is a view in side elevation; and Fig. 3 is a transverse sectional view on the, line A-A of Fig. 1.

In carrying out my invention I provide a cylinder which is formed in two sections l and 2 and each of these sections has an opening in the side thereof as indicated at 3. Slots 4, as indicated in dotted lines, Fig. 2, are formed in the edges of each of the sections 1 and 2 and plates 5 are adapted to overlap the meeting edges of the two sections. Threaded bolts 6 extend through the plates 5 and slots 4 and thumb nuts 7 are adapted to be screwed onto the threaded ends of the bolts. By this arrangement the cylinder may be expanded to lit pipes of various sizes.

Formed on each side of the openings 3 are the guides 8 in which operate the sliding doors 9 which are provided with the flange 10 at the top to limit the downward movement of the doors. Rods 11 are pivotally connected to the doors at 12 and these rods are provided on the lower ends with the openings 13 which are adapted to receive the projections 14. formed on the sections of the cylinder. Handles 15 are ."rovided on the lower end of each et the ro s 7@ S. MIL- A. plate 16 is pivotally mounted within thecylinder and as clearly'shown in Fig. 3 1s of slightly less diameter than the cylinder. This plate 16 is pivoted by means of the rods 17 which enter openings formed in the sections of the cylinder. On the end of one of these rods 17 is secured a crank arm 18 which is also attached to one of the rodsll.

It will be seen that by grasping the handles 15 on the rods 1l the rods may be disengaged from the projections 15 formed on the cylinder and the sliding doors can then be regulated. It will be seen that when operating the sliding door to which the arm 1Q 1s connected the plate within the damper will be turned in various positions thereby cutting off the draft through the pipe. By

this arrangement I am enabled to secure the proper draft through the pipe at all times. I t will also be noted that by this construction the two sliding doors are independently yoperated and one of the doors may be opened or closed without in any way aifecting the position of the plate 16 within the cylinder. lt will also readily be apparent that by havlng the cylinder formed in the two sections it can be adjusted to receive the ends of stove pipes of various sizes. The plates 5 will close the meeting edges of the sections to prevent smoke escaping therefrom. If desired the edges of the sections 1 and 2 could overlap thereby doing away with the plate 5. With this form the bolts would pass through the overlapping edges and o ndly two bolts would be necessary on each s1 e. y

Having fully described the invention what I claim as new and desire to secure by Letters Patent is:

1. A damper comprisingacylinder formed in two sections and having an opening in the side of each section, plates covering the meeting edges of the sections, sliding doorsy for covering the openings in the sections, rods pivotally connected to the doors and having openings therein, projections secured to the cylinder and engaging the openings in the rods, a plate pivotally mounted within the cylinder, and means connecting the plate with one of the door rods.

2. A damper comprising an expansible cylinder formed in two sectio s, each section havin an opening in the si' e thereof and slots 1n the adjacent edges, plates covering' lie the meeting edges, bolts carried by the plates thereto, the end of said crank arm passing and entering the slots, sliding doors for through the perforation in the projection on eoverng the openings the sections, Vertr i one of the: rods.. cally swinging rods connected to the doors En testimony that I claim the and havingperforetions therein, one of said rods having a perforated projection formed l on the side thereof, projections on the secj tiene for entering the perforation's in the rods, and a plate pivotally mounted in the cylinder and having a crank arm connected l foregoing ture in the presence of tvvo Witnesses.

VILLOUGHBY S. MILLER. Witnesses WV. M( ZEGHMAN, CLARA ZELL.

Copies of this patent may b btained for :tive cnt's each, by addressing th Commissioner of Patents,

Washington; 1U. Gf

as my own, I have hereto affixed my signa- 15 

